1 /*

     2  * Copyright 1999 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /* @test

    25  * @bug 4217676

    26  * @summary Ensure that object streams support serialization of long strings

    27  *          (strings whose UTF representation > 64k in length)

    28  */

    29 

    30 import java.io.*;

    31 import java.util.*;

    32 

    33 public class LongString {

    34     public static void main(String[] args) throws Exception {

    35         Random rand = new Random(System.currentTimeMillis());

    36         ByteArrayOutputStream bout;

    37         ByteArrayInputStream bin;

    38         ObjectOutputStream oout;

    39         ObjectInputStream oin;

    40         FileInputStream fin;

    41         File mesgf;

    42 

    43         // generate a long random string

    44         StringBuffer sbuf = new StringBuffer();

    45         for (int i = 0; i < 100000; i++)

    46             sbuf.append((char) rand.nextInt(Character.MAX_VALUE + 1));

    47         String str = sbuf.toString();

    48 

    49         // write and read long string

    50         bout = new ByteArrayOutputStream();

    51         oout = new ObjectOutputStream(bout);

    52         oout.writeObject(str);

    53         oout.flush();

    54         bin = new ByteArrayInputStream(bout.toByteArray());

    55         oin = new ObjectInputStream(bin);

    56         String strcopy = (String) oin.readObject();

    57         if (! str.equals(strcopy))

    58             throw new Error("deserialized long string not equal to original");

    59 

    60         // test backwards compatibility

    61         String mesg = "Message in golden file";

    62         bout = new ByteArrayOutputStream();

    63         oout = new ObjectOutputStream(bout);

    64         oout.writeObject(mesg);

    65         oout.flush();

    66         byte[] buf1 = bout.toByteArray();

    67 

    68         mesgf = new File(System.getProperty("test.src", "."), "mesg.ser");

    69         fin = new FileInputStream(mesgf);

    70         bout = new ByteArrayOutputStream();

    71         while (fin.available() > 0)

    72             bout.write(fin.read());

    73         byte[] buf2 = bout.toByteArray();

    74 

    75         if (! Arrays.equals(buf1, buf2))

    76             throw new Error("incompatible string format (write)");

    77 

    78         fin = new FileInputStream(mesgf);

    79         oin = new ObjectInputStream(fin);

    80         String mesgcopy = (String) oin.readObject();

    81         if (! mesg.equals(mesgcopy))

    82             throw new Error("incompatible string format (read)");

    83     }

    84 }